Let's go indoors.

I usually stay indoors on Sunday.

Catherine stayed indoors because it was raining.

In severe weather, it's best to stay indoors.

People spend over 90 percent of their lives indoors.

What determines the types and distributions of microbes indoors?

Now I just made a transition indoors. That's also interesting.

Because remember, we spend 90 percent of our lives indoors.

Many children had to spend most of their time indoors.

Let's see, should we order that all pets be kept indoors?

We could not possibly stay indoors, with all these sandbags at the windows.

When I was a child, I spent most of my time indoors reading.

And so we retrofit these with sensors and processors, and these robots can fly indoors without GPS.

The fate of microbes indoors depends on complex interactions with humans, and with the human built environment.

Given the amount of time that we spend indoors, it's important to understand how this affects our health.

Fast forward two years later we now have window farms, which are vertical, hydroponic platforms for food growing indoors.

First, governments should re evaluate the voluminous data on DDT that have been compiled since the 1970 s, and they should make DDT available immediately for mosquito control indoors.

Our studies have found that there is a 42 percent probability of one's blood oxygen going up by one percent if one stays indoors in this building for 10 hours.

This is a Scottish castle where people are playing golf indoors, and the trick was to bang the golf ball off of suits of armor which you can't see there.

Humans in the developed world spend more than 90 percent of their lives indoors, where they breathe in and come into contact with trillions of life forms invisible to the naked eye microorganisms.

Our entire facility is comprised of thousands and thousands and thousands of these tools sitting indoors in the dark, quietly self assembling materials and everything from building materials to, in this case, a packaging corner block.

With the help of IIT, TERI, and learnings from NASA, we discovered that there are three basic green plants, common green plants, with which we can grow all the fresh air we need indoors to keep us healthy.

So just as we manage national parks, where we promote the growth of some species and we inhibit the growth of others, we're working towards thinking about buildings using an ecosystem framework where we can promote the kinds of microbes that we want to have indoors.

This summer, friends who live a few kilometers from us in rural Montana in the western US had to interrupt their dinner when a black bear suddenly came out of the trees. They went indoors to watch as it came up to the picnic table, licked the dishes clean, and then drank two cans of beer.

Although DDT is a (modestly) toxic substance, there is a world of difference between applying large amounts of it in the environment as farmers did before it was banned and using it carefully and sparingly to fight mosquitoes and other disease carrying insects. (When it is used at all now, it is now sprayed indoors in small amounts to prevent mosquitoes from nesting.)

Energy poverty is even more acute for the three billion people almost half of the world s population who burn dung, cardboard, and twigs indoors to cook and keep warm. The WHO estimates that while outdoor air pollution in developing country cities may be ten times higher than in advanced country cities, average indoor air pollution, caused by burning wood and dung, is a hundred times higher.

We live in a world where one in six deaths are caused by easily curable infectious diseases one in eight deaths stem from air pollution, mostly from cooking indoors with dung and twigs and billions of people live in abject poverty, with no electricity and little food. We ought never to have entertained the notion that the world s greatest challenge could be to reduce temperature rises in our generation by a fraction of a degree.

Almost three billion people still burn dung, twigs, and other traditional fuels indoors to cook and keep warm, generating noxious fumes that kill an estimated two million people each year, mostly women and children. Likewise, just a hundred years ago, the average American family spent six hours each week during cold months shoveling six tons of coal into the furnace (not to mention cleaning the coal dust from carpets, furniture, curtains, and bedclothes).